#pragma once

#include <iostream>
#include <string>
#include <cstdlib>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <strings.h>
#include "Log.hpp"
#include "Common.hpp"
#include "InetAddr.hpp"

// 基类，规定创建Socket的方法
// 提供一个/若干个/固定模式的socket方法
namespace SocketModule
{
    using namespace LogModule;

    class Socket;
    using SockPtr = std::shared_ptr<Socket>;

    class Socket
    {
    public:
        virtual ~Socket() = default;
        virtual void SocketOrDie() = 0;
        virtual void SetSocketOpt() = 0;
        virtual bool BindOrDie(int port) = 0;
        virtual bool ListenOrDie() = 0;
        virtual SockPtr Accepter(InetAddr *client) = 0;
        virtual void Close() = 0;
        virtual int Recv(std::string* out)=0;
        virtual int Send(const std::string& in)=0;
        virtual int Fd()=0;


        // 提供一个创建listensockfd的固定套路
        void BuildTcpSocketMethod(int port)
        {
            SocketOrDie();
            SetSocketOpt();
            BindOrDie(port);
            ListenOrDie();
        }

        // //提供一个创建listensockfd的固定套路
        // void BuildUdpSocket()
        // {
        //     SocketOrDie();
        //     SetSocketOpt();
        //     BindOrDie();
        //     ListenOrDie();
        // }
    };

    class TcpSocket : public Socket
    {
    public:
        TcpSocket()
            : _sockfd(gdefaultsockfd)
        {
        }

        TcpSocket(int sockfd)
            : _sockfd(sockfd)
        {
        }

        virtual ~TcpSocket()
        {
        }

        virtual void SocketOrDie() override
        {
            _sockfd = socket(AF_INET, SOCK_STREAM, 0);
            if (_sockfd < 0)
            {
                LOG(LogLevel::ERROR) << "socket error";
                exit(SOCKET_ERR);
            }
            LOG(LogLevel::DEBUG) << "socket create success:" << _sockfd;
        }

        virtual void SetSocketOpt() override
        {
        }

        virtual bool BindOrDie(int port) override
        {
            if (_sockfd == gdefaultsockfd)
                return false;

            InetAddr addr(port);
            int n = ::bind(_sockfd, addr.NetAddr(), addr.NetAddrLen());
            if (n < 0)
            {
                LOG(LogLevel::ERROR) << "bind error";
                exit(SOCKET_ERR);
            }
            LOG(LogLevel::DEBUG) << "bind success:" << _sockfd;
            return true;
        }

        virtual bool ListenOrDie() override
        {
            if (_sockfd == gdefaultsockfd)
                return false;

            int n = ::listen(_sockfd, gbacklog);
            if (n < 0)
            {
                LOG(LogLevel::ERROR) << "listen error";
                exit(LISTEN_ERR);
            }
            LOG(LogLevel::DEBUG) << "listen success:" << _sockfd;
            return true;
        }

        // 返回 文件描述符+client info
        virtual SockPtr Accepter(InetAddr *client) override
        {
            if (!client)
                return nullptr;

            struct sockaddr_in peer;
            socklen_t len = sizeof(peer);
            int newsockfd = ::accept(_sockfd, CONV(&peer), &len);
            if (newsockfd < 0)
            {
                LOG(LogLevel::WARNING) << "accept error";
                return nullptr;
            }
            client->SetAddr(peer, len);
            return std::make_shared<TcpSocket>(newsockfd);
        }

        virtual void Close() override
        {
            if (_sockfd == gdefaultsockfd)
                return;
            ::close(_sockfd);
        }

        virtual int Recv(std::string* out)override
        {
            char buffer[1024];
            auto size=::recv(_sockfd,buffer,sizeof(buffer)-1,0);
            if(size>0)
            {
                buffer[size]=0;
                *out=buffer;
            }
            return size;
        }
        virtual int Send(const std::string& in)override
        {
            auto size=::send(_sockfd,in.c_str(),in.size(),0);
            return size;
        }

        virtual int Fd()override
        {
            return _sockfd;
        }

    private:
        int _sockfd;
    };

    // test
    //  int main()
    //  {
    //      Socket*sk=new TcpSocket();
    //      sk->BuildTcpSocket(8080);
    //      return 0;
    //  }
};